The vospace-backend is a storage service management used to integrate a VOSpace interface implementation with a storage solution. This software module persists the information linking a VOSpace Node Identifier with a vospace backend stored file, so it is able to return URIs to access the content of the data objects.The storage solution can be changed thanks to a plug-in architecture allowing to plug-in at run timedifferent storage solutions simply implementing an abstract java class.The service requires an SQL Resource DataBase Management Service (RDBMS) as default built-inpersistence layer. Vospace-backend provides a RESTful interface. It is available at https://github.com/oats-cadcThis guide gives software description and some development hints to make easier to developers toadd new storage solutions to their VOSpace service.